Process of dyeing.



MYBYTIL MEN AND ANTQN QSSSEK' JFBECK, EH1 ELBEEEELD,

FABBENFABRIKEN VOPJLE. EEIEUR. BAYER o: C3,, 53F ELBMRLEELD,GELRIILQJTEZ',

CUREDEATION 9E QEEEEANY.

s eoeriee oi Decline.

Ph oem Au 25%), 12W

1 ,oeoaooe Ho Drawing. Application filed December 26, will. ficiial Ho.cameo.

To all whom it may concern: v

Be it known that we, MYRTI'L KAHN and ANTON Osexmesomdoctors ofphilosophy,

chemists, citizens of the German EIHQiIQ,

residing at Elberfeld, Germany, have invented-new and usefulImprovements in Processes of Dyeing, of Whichthe follow ing is aspecification. i

We have found that brown to blackfest shades on Wool can he obtained bydyeing according to the 0ne-bath method the azo dyes obtained fromhitro-Qeminophenols and bete-naphthol 011 wool in the presence of achrome mot-dent.

- In order to illustrate the new process more fully the followingexample is given, the arts being by Weight:-Prepare the dyeeth with percent. of the dye: fi-chloroenitro .2 aminophenol+betemephthol, bring tothe boil, add 2 per cent. of potassium bichronicle, enter the wool at60-80 6,, bring to the boil, boil during hours and add slowly per cent.of acetic acid and continue boiling for 1-1-3- lIOUI'S. A deep deckbrown fest shade is thus obtained, fast to light, felling and rubbing.

Another chrome compound or another of the above mentioned dyes can heused c. g. dyes obtained from betwimphthol and L nitro-Z-aminophenol,iiiti'o-angino-orthmcresol, 5- or 6-niti'o-4-chloro-2-zii 1inophenol or2.111 the art of dyeing Wool "the improve ment consisting in dyeing woolfrom an acid both containing potassium bichminate and.

.en unsiilfonaied azo dye obtained fi'onhbfillfl naphthol andintro-2-einniophcnol, sub-- stancielly as described.

In the artof dyeing Wool the improve,-

meet consisting in dyeing wool from an acid hath containing a chiomemoment and the dye: fi-chloicol micro-2 ziminophenol ozobclwnephthohsuhstain'zially as described.

:1. In the art of dyeing wool the improvement consisting in dyeing Woolfrom on acid bath containing potassium bichromate and the dye 6-chl010-4-3fll m ?-ai iinophenol--ozobcte-naphi'hol, suhsianiieliydescribed.

In testimony whereof we have hereunto set ouchonds in the presence oftwo subscribing witnesses.

MYRTHJ K B ll. in. 12s,} ANliJhl OSSEI [Li 6.}

Witnesses NUFER, ALBERT Home.

